aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/kvm/kvm_main.c
diff options
context:
space:
mode:
authorCarsten Otte <cotte@de.ibm.com>2007-10-29 11:09:35 -0400
committerAvi Kivity <avi@qumranet.com>2008-01-30 10:52:58 -0500
commita03490ed29d2771c675d4d9c0ffe22e19a1757f3 (patch)
treed4ed168cbb506282d4d6dddf922a3bdea0ae2ca7 /drivers/kvm/kvm_main.c
parent6866b83ed7240bf4a7c50836ee10f61c8534503f (diff)
KVM: Portability: Move control register helper functions to x86.c
This patch moves the definitions of CR0_RESERVED_BITS, CR4_RESERVED_BITS, and CR8_RESERVED_BITS along with the following functions from kvm_main.c to x86.c: set_cr0(), set_cr3(), set_cr4(), set_cr8(), get_cr8(), lmsw(), load_pdptrs() The static function wrapper inject_gp is duplicated in kvm_main.c and x86.c for now, the version in kvm_main.c should disappear once the last user of it is gone too. The function load_pdptrs is no longer static, and now defined in x86.h for the time being, until the last user of it is gone from kvm_main.c. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm_main.c')
-rw-r--r--drivers/kvm/kvm_main.c219
1 files changed, 0 insertions, 219 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index e8972a82544b..8f7125710d02 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -90,17 +90,6 @@ static struct kvm_stats_debugfs_item {
90 90
91static struct dentry *debugfs_dir; 91static struct dentry *debugfs_dir;
92 92
93#define CR0_RESERVED_BITS \
94 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
95 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
96 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
97#define CR4_RESERVED_BITS \
98 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
99 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
100 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
101 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
102
103#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
104#define EFER_RESERVED_BITS 0xfffffffffffff2fe 93#define EFER_RESERVED_BITS 0xfffffffffffff2fe
105 94
106static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, 95static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
@@ -348,214 +337,6 @@ static void inject_gp(struct kvm_vcpu *vcpu)
348 kvm_x86_ops->inject_gp(vcpu, 0); 337 kvm_x86_ops->inject_gp(vcpu, 0);
349} 338}
350 339
351/*
352 * Load the pae pdptrs. Return true is they are all valid.
353 */
354static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
355{
356 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
357 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
358 int i;
359 int ret;
360 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
361
362 mutex_lock(&vcpu->kvm->lock);
363 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
364 offset * sizeof(u64), sizeof(pdpte));
365 if (ret < 0) {
366 ret = 0;
367 goto out;
368 }
369 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
370 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
371 ret = 0;
372 goto out;
373 }
374 }
375 ret = 1;
376
377 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
378out:
379 mutex_unlock(&vcpu->kvm->lock);
380
381 return ret;
382}
383
384void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
385{
386 if (cr0 & CR0_RESERVED_BITS) {
387 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
388 cr0, vcpu->cr0);
389 inject_gp(vcpu);
390 return;
391 }
392
393 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
394 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
395 inject_gp(vcpu);
396 return;
397 }
398
399 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
400 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
401 "and a clear PE flag\n");
402 inject_gp(vcpu);
403 return;
404 }
405
406 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
407#ifdef CONFIG_X86_64
408 if ((vcpu->shadow_efer & EFER_LME)) {
409 int cs_db, cs_l;
410
411 if (!is_pae(vcpu)) {
412 printk(KERN_DEBUG "set_cr0: #GP, start paging "
413 "in long mode while PAE is disabled\n");
414 inject_gp(vcpu);
415 return;
416 }
417 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
418 if (cs_l) {
419 printk(KERN_DEBUG "set_cr0: #GP, start paging "
420 "in long mode while CS.L == 1\n");
421 inject_gp(vcpu);
422 return;
423
424 }
425 } else
426#endif
427 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
428 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
429 "reserved bits\n");
430 inject_gp(vcpu);
431 return;
432 }
433
434 }
435
436 kvm_x86_ops->set_cr0(vcpu, cr0);
437 vcpu->cr0 = cr0;
438
439 mutex_lock(&vcpu->kvm->lock);
440 kvm_mmu_reset_context(vcpu);
441 mutex_unlock(&vcpu->kvm->lock);
442 return;
443}
444EXPORT_SYMBOL_GPL(set_cr0);
445
446void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
447{
448 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
449}
450EXPORT_SYMBOL_GPL(lmsw);
451
452void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
453{
454 if (cr4 & CR4_RESERVED_BITS) {
455 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
456 inject_gp(vcpu);
457 return;
458 }
459
460 if (is_long_mode(vcpu)) {
461 if (!(cr4 & X86_CR4_PAE)) {
462 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
463 "in long mode\n");
464 inject_gp(vcpu);
465 return;
466 }
467 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
468 && !load_pdptrs(vcpu, vcpu->cr3)) {
469 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
470 inject_gp(vcpu);
471 return;
472 }
473
474 if (cr4 & X86_CR4_VMXE) {
475 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
476 inject_gp(vcpu);
477 return;
478 }
479 kvm_x86_ops->set_cr4(vcpu, cr4);
480 vcpu->cr4 = cr4;
481 mutex_lock(&vcpu->kvm->lock);
482 kvm_mmu_reset_context(vcpu);
483 mutex_unlock(&vcpu->kvm->lock);
484}
485EXPORT_SYMBOL_GPL(set_cr4);
486
487void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
488{
489 if (is_long_mode(vcpu)) {
490 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
491 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
492 inject_gp(vcpu);
493 return;
494 }
495 } else {
496 if (is_pae(vcpu)) {
497 if (cr3 & CR3_PAE_RESERVED_BITS) {
498 printk(KERN_DEBUG
499 "set_cr3: #GP, reserved bits\n");
500 inject_gp(vcpu);
501 return;
502 }
503 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
504 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
505 "reserved bits\n");
506 inject_gp(vcpu);
507 return;
508 }
509 }
510 /*
511 * We don't check reserved bits in nonpae mode, because
512 * this isn't enforced, and VMware depends on this.
513 */
514 }
515
516 mutex_lock(&vcpu->kvm->lock);
517 /*
518 * Does the new cr3 value map to physical memory? (Note, we
519 * catch an invalid cr3 even in real-mode, because it would
520 * cause trouble later on when we turn on paging anyway.)
521 *
522 * A real CPU would silently accept an invalid cr3 and would
523 * attempt to use it - with largely undefined (and often hard
524 * to debug) behavior on the guest side.
525 */
526 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
527 inject_gp(vcpu);
528 else {
529 vcpu->cr3 = cr3;
530 vcpu->mmu.new_cr3(vcpu);
531 }
532 mutex_unlock(&vcpu->kvm->lock);
533}
534EXPORT_SYMBOL_GPL(set_cr3);
535
536void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
537{
538 if (cr8 & CR8_RESERVED_BITS) {
539 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
540 inject_gp(vcpu);
541 return;
542 }
543 if (irqchip_in_kernel(vcpu->kvm))
544 kvm_lapic_set_tpr(vcpu, cr8);
545 else
546 vcpu->cr8 = cr8;
547}
548EXPORT_SYMBOL_GPL(set_cr8);
549
550unsigned long get_cr8(struct kvm_vcpu *vcpu)
551{
552 if (irqchip_in_kernel(vcpu->kvm))
553 return kvm_lapic_get_cr8(vcpu);
554 else
555 return vcpu->cr8;
556}
557EXPORT_SYMBOL_GPL(get_cr8);
558
559void fx_init(struct kvm_vcpu *vcpu) 340void fx_init(struct kvm_vcpu *vcpu)
560{ 341{
561 unsigned after_mxcsr_mask; 342 unsigned after_mxcsr_mask;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-07 14:09:13 -0500